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<h1 id="sec_name">
<span data-if="hdevelop" style="display:inline;">open_serial</span><span data-if="c" style="display:none;">T_open_serial</span><span data-if="cpp" style="display:none;">OpenSerial</span><span data-if="dotnet" style="display:none;">OpenSerial</span><span data-if="python" style="display:none;">open_serial</span> (算子名称)</h1>
<h2>名称</h2>
<p><code><span data-if="hdevelop" style="display:inline;">open_serial</span><span data-if="c" style="display:none;">T_open_serial</span><span data-if="cpp" style="display:none;">OpenSerial</span><span data-if="dotnet" style="display:none;">OpenSerial</span><span data-if="python" style="display:none;">open_serial</span></code> — Open a serial device.</p>
<h2 id="sec_synopsis">参数签名</h2>
<div data-if="hdevelop" style="display:inline;">
<p>
<code><b>open_serial</b>( :  : <a href="#PortName"><i>PortName</i></a> : <a href="#SerialHandle"><i>SerialHandle</i></a>)</code></p>
</div>
<div data-if="c" style="display:none;">
<p>
<code>Herror <b>T_open_serial</b>(const Htuple <a href="#PortName"><i>PortName</i></a>, Htuple* <a href="#SerialHandle"><i>SerialHandle</i></a>)</code></p>
</div>
<div data-if="cpp" style="display:none;">
<p>
<code>void <b>OpenSerial</b>(const HTuple&amp; <a href="#PortName"><i>PortName</i></a>, HTuple* <a href="#SerialHandle"><i>SerialHandle</i></a>)</code></p>
<p>
<code>void <a href="HSerial.html">HSerial</a>::<b>HSerial</b>(const HString&amp; <a href="#PortName"><i>PortName</i></a>)</code></p>
<p>
<code>void <a href="HSerial.html">HSerial</a>::<b>HSerial</b>(const char* <a href="#PortName"><i>PortName</i></a>)</code></p>
<p>
<code>void <a href="HSerial.html">HSerial</a>::<b>HSerial</b>(const wchar_t* <a href="#PortName"><i>PortName</i></a>)  <span class="signnote">
            (
            Windows only)
          </span></code></p>
<p>
<code>void <a href="HSerial.html">HSerial</a>::<b>OpenSerial</b>(const HString&amp; <a href="#PortName"><i>PortName</i></a>)</code></p>
<p>
<code>void <a href="HSerial.html">HSerial</a>::<b>OpenSerial</b>(const char* <a href="#PortName"><i>PortName</i></a>)</code></p>
<p>
<code>void <a href="HSerial.html">HSerial</a>::<b>OpenSerial</b>(const wchar_t* <a href="#PortName"><i>PortName</i></a>)  <span class="signnote">
            (
            Windows only)
          </span></code></p>
</div>
<div data-if="com" style="display:none;"></div>
<div data-if="dotnet" style="display:none;">
<p>
<code>static void <a href="HOperatorSet.html">HOperatorSet</a>.<b>OpenSerial</b>(<a href="HTuple.html">HTuple</a> <a href="#PortName"><i>portName</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#SerialHandle"><i>serialHandle</i></a>)</code></p>
<p>
<code>public <a href="HSerial.html">HSerial</a>(string <a href="#PortName"><i>portName</i></a>)</code></p>
<p>
<code>void <a href="HSerial.html">HSerial</a>.<b>OpenSerial</b>(string <a href="#PortName"><i>portName</i></a>)</code></p>
</div>
<div data-if="python" style="display:none;">
<p>
<code>def <b>open_serial</b>(<a href="#PortName"><i>port_name</i></a>: str) -&gt; HHandle</code></p>
</div>
<h2 id="sec_description">描述</h2>
<p><code><span data-if="hdevelop" style="display:inline">open_serial</span><span data-if="c" style="display:none">open_serial</span><span data-if="cpp" style="display:none">OpenSerial</span><span data-if="com" style="display:none">OpenSerial</span><span data-if="dotnet" style="display:none">OpenSerial</span><span data-if="python" style="display:none">open_serial</span></code> opens a serial device.  The name of the device
is determined by the parameter <a href="#PortName"><i><code><span data-if="hdevelop" style="display:inline">PortName</span><span data-if="c" style="display:none">PortName</span><span data-if="cpp" style="display:none">PortName</span><span data-if="com" style="display:none">PortName</span><span data-if="dotnet" style="display:none">portName</span><span data-if="python" style="display:none">port_name</span></code></i></a> and is operating
system specific.  On Windows machines,
<i><span data-if="hdevelop" style="display:inline">'COM1'</span><span data-if="c" style="display:none">"COM1"</span><span data-if="cpp" style="display:none">"COM1"</span><span data-if="com" style="display:none">"COM1"</span><span data-if="dotnet" style="display:none">"COM1"</span><span data-if="python" style="display:none">"COM1"</span></i>-<i><span data-if="hdevelop" style="display:inline">'COM4'</span><span data-if="c" style="display:none">"COM4"</span><span data-if="cpp" style="display:none">"COM4"</span><span data-if="com" style="display:none">"COM4"</span><span data-if="dotnet" style="display:none">"COM4"</span><span data-if="python" style="display:none">"COM4"</span></i> is typically used, while on Unix-like
systems the serial devices usually are named <i><span data-if="hdevelop" style="display:inline">'/dev/tty*'</span><span data-if="c" style="display:none">"/dev/tty*"</span><span data-if="cpp" style="display:none">"/dev/tty*"</span><span data-if="com" style="display:none">"/dev/tty*"</span><span data-if="dotnet" style="display:none">"/dev/tty*"</span><span data-if="python" style="display:none">"/dev/tty*"</span></i>.
The parameters of the serial device, e.g., its speed or number of
data bits, are set to the system default values for the respective
device  after the device has been opened.  They can be set or
changed by calling <a href="set_serial_param.html"><code><span data-if="hdevelop" style="display:inline">set_serial_param</span><span data-if="c" style="display:none">set_serial_param</span><span data-if="cpp" style="display:none">SetSerialParam</span><span data-if="com" style="display:none">SetSerialParam</span><span data-if="dotnet" style="display:none">SetSerialParam</span><span data-if="python" style="display:none">set_serial_param</span></code></a>.</p>
<h2 id="sec_execution">运行信息</h2>
<ul>
  <li>多线程类型:可重入(与非独占操作符并行运行)。</li>
<li>多线程作用域:全局(可以从任何线程调用)。</li>
  <li>未经并行化处理。</li>
</ul>
<p>This operator returns a handle. Note that the state of an instance of this handle type may be changed by specific operators even though the handle is used as an input parameter by those operators.</p>
<h2 id="sec_parameters">参数表</h2>
  <div class="par">
<div class="parhead">
<span id="PortName" class="parname"><b><code><span data-if="hdevelop" style="display:inline">PortName</span><span data-if="c" style="display:none">PortName</span><span data-if="cpp" style="display:none">PortName</span><span data-if="com" style="display:none">PortName</span><span data-if="dotnet" style="display:none">portName</span><span data-if="python" style="display:none">port_name</span></code></b> (input_control)  </span><span>filename <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">str</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string)</span><span data-if="dotnet" style="display:none"> (<i>string</i>)</span><span data-if="cpp" style="display:none"> (<i>HString</i>)</span><span data-if="c" style="display:none"> (<i>char*</i>)</span></span>
</div>
<p class="pardesc">Name of the serial port.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>
    <span data-if="hdevelop" style="display:inline">'COM1'</span>
    <span data-if="c" style="display:none">"COM1"</span>
    <span data-if="cpp" style="display:none">"COM1"</span>
    <span data-if="com" style="display:none">"COM1"</span>
    <span data-if="dotnet" style="display:none">"COM1"</span>
    <span data-if="python" style="display:none">"COM1"</span>
</p>
<p class="pardesc"><span class="parcat">Suggested values:
      </span><span data-if="hdevelop" style="display:inline">'COM1'</span><span data-if="c" style="display:none">"COM1"</span><span data-if="cpp" style="display:none">"COM1"</span><span data-if="com" style="display:none">"COM1"</span><span data-if="dotnet" style="display:none">"COM1"</span><span data-if="python" style="display:none">"COM1"</span>, <span data-if="hdevelop" style="display:inline">'COM2'</span><span data-if="c" style="display:none">"COM2"</span><span data-if="cpp" style="display:none">"COM2"</span><span data-if="com" style="display:none">"COM2"</span><span data-if="dotnet" style="display:none">"COM2"</span><span data-if="python" style="display:none">"COM2"</span>, <span data-if="hdevelop" style="display:inline">'COM3'</span><span data-if="c" style="display:none">"COM3"</span><span data-if="cpp" style="display:none">"COM3"</span><span data-if="com" style="display:none">"COM3"</span><span data-if="dotnet" style="display:none">"COM3"</span><span data-if="python" style="display:none">"COM3"</span>, <span data-if="hdevelop" style="display:inline">'COM4'</span><span data-if="c" style="display:none">"COM4"</span><span data-if="cpp" style="display:none">"COM4"</span><span data-if="com" style="display:none">"COM4"</span><span data-if="dotnet" style="display:none">"COM4"</span><span data-if="python" style="display:none">"COM4"</span>, <span data-if="hdevelop" style="display:inline">'/dev/ttya'</span><span data-if="c" style="display:none">"/dev/ttya"</span><span data-if="cpp" style="display:none">"/dev/ttya"</span><span data-if="com" style="display:none">"/dev/ttya"</span><span data-if="dotnet" style="display:none">"/dev/ttya"</span><span data-if="python" style="display:none">"/dev/ttya"</span>, <span data-if="hdevelop" style="display:inline">'/dev/ttyb'</span><span data-if="c" style="display:none">"/dev/ttyb"</span><span data-if="cpp" style="display:none">"/dev/ttyb"</span><span data-if="com" style="display:none">"/dev/ttyb"</span><span data-if="dotnet" style="display:none">"/dev/ttyb"</span><span data-if="python" style="display:none">"/dev/ttyb"</span>, <span data-if="hdevelop" style="display:inline">'/dev/tty00'</span><span data-if="c" style="display:none">"/dev/tty00"</span><span data-if="cpp" style="display:none">"/dev/tty00"</span><span data-if="com" style="display:none">"/dev/tty00"</span><span data-if="dotnet" style="display:none">"/dev/tty00"</span><span data-if="python" style="display:none">"/dev/tty00"</span>, <span data-if="hdevelop" style="display:inline">'/dev/tty01'</span><span data-if="c" style="display:none">"/dev/tty01"</span><span data-if="cpp" style="display:none">"/dev/tty01"</span><span data-if="com" style="display:none">"/dev/tty01"</span><span data-if="dotnet" style="display:none">"/dev/tty01"</span><span data-if="python" style="display:none">"/dev/tty01"</span>, <span data-if="hdevelop" style="display:inline">'/dev/ttyd1'</span><span data-if="c" style="display:none">"/dev/ttyd1"</span><span data-if="cpp" style="display:none">"/dev/ttyd1"</span><span data-if="com" style="display:none">"/dev/ttyd1"</span><span data-if="dotnet" style="display:none">"/dev/ttyd1"</span><span data-if="python" style="display:none">"/dev/ttyd1"</span>, <span data-if="hdevelop" style="display:inline">'/dev/ttyd2'</span><span data-if="c" style="display:none">"/dev/ttyd2"</span><span data-if="cpp" style="display:none">"/dev/ttyd2"</span><span data-if="com" style="display:none">"/dev/ttyd2"</span><span data-if="dotnet" style="display:none">"/dev/ttyd2"</span><span data-if="python" style="display:none">"/dev/ttyd2"</span>, <span data-if="hdevelop" style="display:inline">'/dev/cua0'</span><span data-if="c" style="display:none">"/dev/cua0"</span><span data-if="cpp" style="display:none">"/dev/cua0"</span><span data-if="com" style="display:none">"/dev/cua0"</span><span data-if="dotnet" style="display:none">"/dev/cua0"</span><span data-if="python" style="display:none">"/dev/cua0"</span>, <span data-if="hdevelop" style="display:inline">'/dev/cua1'</span><span data-if="c" style="display:none">"/dev/cua1"</span><span data-if="cpp" style="display:none">"/dev/cua1"</span><span data-if="com" style="display:none">"/dev/cua1"</span><span data-if="dotnet" style="display:none">"/dev/cua1"</span><span data-if="python" style="display:none">"/dev/cua1"</span></p>
</div>
  <div class="par">
<div class="parhead">
<span id="SerialHandle" class="parname"><b><code><span data-if="hdevelop" style="display:inline">SerialHandle</span><span data-if="c" style="display:none">SerialHandle</span><span data-if="cpp" style="display:none">SerialHandle</span><span data-if="com" style="display:none">SerialHandle</span><span data-if="dotnet" style="display:none">serialHandle</span><span data-if="python" style="display:none">serial_handle</span></code></b> (output_control)  </span><span>serial <code>→</code> <span data-if="dotnet" style="display:none"><a href="HSerial.html">HSerial</a>, </span><span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">HHandle</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (handle)</span><span data-if="dotnet" style="display:none"> (<i>IntPtr</i>)</span><span data-if="cpp" style="display:none"> (<i>HHandle</i>)</span><span data-if="c" style="display:none"> (<i>handle</i>)</span></span>
</div>
<p class="pardesc">Serial interface handle.</p>
</div>
<h2 id="sec_result">结果</h2>
<p>If the parameters are correct and the device could be opened, the
operator <code><span data-if="hdevelop" style="display:inline">open_serial</span><span data-if="c" style="display:none">open_serial</span><span data-if="cpp" style="display:none">OpenSerial</span><span data-if="com" style="display:none">OpenSerial</span><span data-if="dotnet" style="display:none">OpenSerial</span><span data-if="python" style="display:none">open_serial</span></code> 返回值 <TT>2</TT> (
      <TT>H_MSG_TRUE</TT>)
    .  Otherwise an
exception is raised.</p>
<h2 id="sec_successors">可能的后置算子</h2>
<p>
<code><a href="set_serial_param.html"><span data-if="hdevelop" style="display:inline">set_serial_param</span><span data-if="c" style="display:none">set_serial_param</span><span data-if="cpp" style="display:none">SetSerialParam</span><span data-if="com" style="display:none">SetSerialParam</span><span data-if="dotnet" style="display:none">SetSerialParam</span><span data-if="python" style="display:none">set_serial_param</span></a></code>, 
<code><a href="read_serial.html"><span data-if="hdevelop" style="display:inline">read_serial</span><span data-if="c" style="display:none">read_serial</span><span data-if="cpp" style="display:none">ReadSerial</span><span data-if="com" style="display:none">ReadSerial</span><span data-if="dotnet" style="display:none">ReadSerial</span><span data-if="python" style="display:none">read_serial</span></a></code>, 
<code><a href="write_serial.html"><span data-if="hdevelop" style="display:inline">write_serial</span><span data-if="c" style="display:none">write_serial</span><span data-if="cpp" style="display:none">WriteSerial</span><span data-if="com" style="display:none">WriteSerial</span><span data-if="dotnet" style="display:none">WriteSerial</span><span data-if="python" style="display:none">write_serial</span></a></code>, 
<code><a href="close_serial.html"><span data-if="hdevelop" style="display:inline">close_serial</span><span data-if="c" style="display:none">close_serial</span><span data-if="cpp" style="display:none">CloseSerial</span><span data-if="com" style="display:none">CloseSerial</span><span data-if="dotnet" style="display:none">CloseSerial</span><span data-if="python" style="display:none">close_serial</span></a></code>
</p>
<h2 id="sec_see">参考其它</h2>
<p>
<code><a href="set_serial_param.html"><span data-if="hdevelop" style="display:inline">set_serial_param</span><span data-if="c" style="display:none">set_serial_param</span><span data-if="cpp" style="display:none">SetSerialParam</span><span data-if="com" style="display:none">SetSerialParam</span><span data-if="dotnet" style="display:none">SetSerialParam</span><span data-if="python" style="display:none">set_serial_param</span></a></code>, 
<code><a href="get_serial_param.html"><span data-if="hdevelop" style="display:inline">get_serial_param</span><span data-if="c" style="display:none">get_serial_param</span><span data-if="cpp" style="display:none">GetSerialParam</span><span data-if="com" style="display:none">GetSerialParam</span><span data-if="dotnet" style="display:none">GetSerialParam</span><span data-if="python" style="display:none">get_serial_param</span></a></code>, 
<code><a href="open_file.html"><span data-if="hdevelop" style="display:inline">open_file</span><span data-if="c" style="display:none">open_file</span><span data-if="cpp" style="display:none">OpenFile</span><span data-if="com" style="display:none">OpenFile</span><span data-if="dotnet" style="display:none">OpenFile</span><span data-if="python" style="display:none">open_file</span></a></code>
</p>
<h2 id="sec_module">模块</h2>
<p>
Foundation</p>
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